  "> 1. [字典的文档](https://docs.python.org/3/tutorial/datastructures.html#dictionaries) \n",
    "> 2. 字典的重要属性：\n",
    ">> 1. 结构：key:value（键值对）\n",
    ">> 2. 字典是无序的，我们通过键(key)去查找值(value)，就好像list用索引(index)查找值(value)一样，只不过字典的“索引”被定义了名字\n",
    ">> 3. 字典对key的定义有一定的要求：key是由\"不可变\"的数据结构才可以定义，list是不能作为key来定义的。\n",
    ">> 4. 字典的key是唯一的，字典的值value也可以不唯一。（list的值是唯一的么？）\n",
    "> 3. 字典的创建\n"

     "users = [\n",
    "    [\"zengzihao\",19,\"student\",20000],\n",
    "    [\"xiaohong\",20,\"student2\",30000]\n",
    "    \n",
    "]\n",
# 试对比：\n",
    "users_dict = {\n",
    "    \"zengzihao\":[19,\"student\",20000],\n",
    "    \"xiaohong\":[20,\"student2\",30000]\n",
    "}"

 "data": {
      "text/plain": [
       "['xiaoming', 26, 'IT', 30000]"
      ]
     },
"source": [
    "# 查询xiaoming的信息：\n",
    "users[1]"
   ]

   




